There was similar goalkeeping heroics at the other end moments later when Andre Onana clawed Haaland’s header off the line.

The United shot-stopper wasn’t able to repeat the feat at the start of the second half when Haaland was found in acres of space and headed coolly into a virtually open net to double City’s lead.

Erling Haaland scored twice as Manchester City ran riot against Man United at Old Trafford

United were unhinged by City’s brilliance and rarely looked like fighting back against their rivals

City opened the scoring after Rasmus Hojlund (far right) was deemed to have fouled Rodri (far left) in the penalty box

Haaland scored his first goal of the game from the penalty spot to put the visitors ahead

Mason Mount’s half time introduction unhinged United’s midfield balance and Erik ten Hag’s tactical change hindered more than helped the hosts get back into the game.

City began to exert their control and United could barely get a foothold in proceedings as Onana was forced into making several smart stops as United hung on.

Haaland unselfishly played a cross back into the box for Phil Foden to score City’s third and wrap up a convincing victory at the home of their rivals.